Noxxic use numbers pulled almost entirely out of thin air.
As it has been stated far too many times to count on these forums, you cannot take simulationcraft and put numbers from different modules next to each other, comparing like for like is fine but extending that outwards across all dps classes is a ludicrous proposition. Wait a few weeks for more data and something like raidbots will be *more* useful (NEVER perfect or what you should base 100% of your opinion on) but making claims that we can't compete in the first week when the responses from other dk's have been much the opposite seems a little silly.
Edit: not to mention (last I checked) noxxic use simcraft settings like short duration, patchwerk style fights.